Fix: Some ajax features was broken

htdocs/ajaxbox.php

htdocs/compta/facture/contact.php

htdocs/html.form.class.php

htdocs/html.formcompany.class.php

htdocs/lib/ajax.lib.php

htdocs/lib/lib_head.js

htdocs/main.inc.php

htdocs/product/ajaxproducts.php

htdocs/soc.php

htdocs/societe.php

htdocs/societe/ajaxcompanies.php

htdocs/societe/ajaxcountries.php